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nemesis

American  
[nem-uh-sis] / ˈnɛm ə sɪs /

noun

plural

nemeses
  1. something that a person cannot conquer, achieve, etc..

    The performance test proved to be my nemesis.

    Synonyms:
    Waterloo
  2. an opponent or rival whom a person cannot best or overcome.

  3. (initial capital letter) the goddess of divine retribution.

  4. an agent or act of retribution or punishment.

    Synonyms:
    Waterloo, ruin, undoing, downfall

Nemesis British  
/ ˈnɛmɪsɪs /

noun

  1. Greek myth the goddess of retribution and vengeance

  2. (sometimes not capital) any agency of retribution and vengeance

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Nemesis Cultural  
  1. In classical mythology, the Greek goddess of vengeance.


Discover More

By extension, a “nemesis” is an avenger. One's nemesis is that which will bring on one's destruction or downfall.

Etymology

Origin of nemesis

< Latin < Greek némesis literally, a dealing out, verbid of némein to dispense (justice); -sis

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

His nemesis was more than a rival—he was a symbol.

From The Wall Street Journal

The professional rivalries are real, as J.D. finds when his hiring as Sacred Heart’s new chief of medicine gains him a nemesis in Joel Kim Booster’s wonderfully shady Dr. Eric Park.

From Salon

And David plays Lincoln’s nemesis, Stevie Nichols, the very successful former partner of Lincoln’s late mother, upon whom the son remains perversely fixated.

From Los Angeles Times

But it may well be his one time political ally and occasional political foe becomes his nemesis.

From BBC

A turbulent climate always has been the nemesis of Highway 1’s splendor.

From Los Angeles Times